Crown CT 4150, CT 8150, CT 875, CT 475 operation manual Front Panel

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CT Power Amplifiers

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1.Fault Indicator

Red LED

One per output channel

Flashes when the amplifier output channel has stopped operating. Usually this means that the amplifier must be serviced. (See Section 15 Troubleshooting)

2.Thermal Indicator

Red LED

One per output channel

If exceeds Thermal Limits, output channels will shut down in pairs until thermal levels are within tolerant ranges.

Illuminates when the channel approaches temperature constraints or is about to shut down. Audible distortion may be heard.

Unit stops amplification for each channel until temperature returns to acceptable level. Once the amp cools off enough, led turns off, audio starts again.

3.Clip Indicator

Red LED

One per output channel

Illuminates when the channel is at the threshold of audible distortion (See Section 15 Troubleshooting – reduce input level)

When the limiter is turned on the Clip Indicator will illuminate when the limiter is protecting the amplifier from input overload.

4.Signal Indicator

Green LED

One per input channel

Illuminates when the input signal exceeds

-24dBu

5.Ready Indicator

Green LED

One per input channel

Illuminates when the channel is ready for signal

Illuminates when the channel is initialized and ready to produce audio output.

Ready indicator will flash when the channel is in standby.

Ready Indictor will not illuminate or flash when the amplifier is in deep sleep.

6.Power Indicator

Blue LED

Indicates AC power has been applied and is within the safe operating range of the power supply. The LED will flash when the AC line voltage is above or below the nominal rated value. The LED will also flash when the amplifier is in Deep Sleep mode AND the power button has been pushed.

7.Data Indicator

Yellow LED (not functional in analog version)

Indicates network activity

Reserved for future releases (Lite and DSP)

8.Power Button

On/off push button

9.Cooling Vent

Allows for air flow and cooling of the amplifier

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Operation Manual

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Contents 143368-1 Some models may be exported under the name AmcronFCC Compliance Notice European Representative’s Name and Address Equipment Type Power Amplifiers Family Name CT seriesSafety Standard EMC StandardsTable of Contents Power Efficiency How to Use This Manual FeaturesFeatures Audiophile Sound WelcomeSetup UnpackYour Amplifier InstallYour AmplifierDistance Choose Input WireConnectors Up to 25 ft .6m 16 AWGUsing an adapter or other methods WireYour SystemDriveCore amplifier can be configured in two ways Connect to AC MainsPrecautions Startup ProcedureFront Panel Back Panel Amp Configuration Operating ModesDeep Sleep Auxiliary PortInput Routing Amp StatusAdvanced Features AccessoriesTroubleshooting Specifications AC Power Draw and Thermal Disspation AC Power Draw and Thermal Dissipation120VAC 240VAC Thermal Dispation AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Dissipation Service Warranty 10/10Worldwide Except USA & Canada This page Intentionally Left Blank Crown Audio, Inc FaxCT Power Amplifiers Credit card information Phone # Fax # E-MailCity State/Prov Postal Code Country Type of credit card